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| 蜈蚣藻多糖诱导耐盐碱菌对苏打盐碱土修复作用及黄瓜生长的影响 |
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刘娟1,2, 陈晓琳1,3, 战将1, 刘松1,3, 王雪芹1,3
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1.中国科学院海洋研究所实验海洋生物学重点实验室, 山东 青岛 266071;2.中国科学院大学, 北京 100049;3.青岛海洋科学技术中心海洋药物与生物制品功能实验室, 山东 青岛 266237
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| 摘要: |
| 通过多糖-菌单独作用以及多糖-菌-植物三位一体的方式作用于苏打盐碱土, 探究海藻多糖诱导海洋源耐盐碱菌对盐碱土的修复效果以及对植物生长的影响。研究发现耐盐碱菌具有降低盐碱土pH的能力, 蜈蚣藻多糖能够更有效地促进耐盐碱菌降低苏打盐碱土的pH。通过测定土壤有机质、速效氮和无机磷含量, 发现添加蜈蚣藻多糖能够增加土壤的无机磷含量, 添加耐盐碱菌液和蜈蚣藻多糖溶液更好地增加土壤速效氮和有机质含量。在此基础上, 进一步通过多糖-菌-植物三位一体对苏打盐碱土修复作用研究, 发现蜈蚣藻多糖诱导耐盐碱菌修复苏打盐碱土过程中能够明显促进黄瓜幼苗的生长, 主要表现在茎、叶以及根系生长优势。PB组(添加蜈蚣藻多糖溶液和耐盐碱菌液)土壤有机质和无机磷含量最低, 与PB组黄瓜植株生长状态相一致。通过微生物多样性分析, 发现添加菌液和蜈蚣藻多糖溶液能够提高土壤微生物多样性, 增加Mesobacillus、Fictibacillus arsenicus、Ensifer adhaerens、Lysobacter等土壤有益菌。 |
| 关键词: 海藻多糖 耐盐碱菌 pH 苏打盐碱土 修复 植物 |
| DOI：10.11759/hykx20250326001 |
| 分类号:P745 |
| 基金项目:山东省自然科学基金(ZR2023MD095) |
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| Effects of saline-tolerant bacteria induced by Grateloupia filicina polysaccharides on the remediation of soda saline-alkali soil and cucumber growth |
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LIU Juan1,2, CHEN Xiaolin1,3, ZHAN Jiang1, LIU Song1,3, WANG Xueqin1,3
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1.CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2.University of Chinese Academy of Sciences, Beijing 100049, China;3.Laboratory for Marine Drugs and Bioproducts, Qingdao Marine Science and Technology Center, Qingdao 266237, China
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| Abstract: |
| This study investigated the effect of salinity-tolerant bacteria induced by polysaccharides derived from the seaweed Grateloupia filicina on the rehabilitation of soda saline soil and its effect on plant growth through polysaccharide-bacteria or polysaccharide-bacteria-plant interactions. The salinity-tolerant bacteria reduced the pH of the saline soil. The addition of polysaccharides alone increased the inorganic phosphorus content of the soil; a combination of the bacteria and the polysaccharide solution (PB) markedly enhanced the available nitrogen and organic matter content. Thus, we further examined the remediation efficiency of the polysaccharide-bacteria-plant combination. G. filicina polysaccharides induced the proliferation of saline-tolerant bacteria, which significantly promoted the growth of cucumber plants during the remediation of soda saline soil, mainly in terms of stem, leaf, and root biomass. The PB-treated group had the lowest levels of soil organic matter and inorganic phosphorus, which was consistent with the best growth status of cucumber plants. Microbial diversity analysis revealed that PB treatment increased soil microbial enzyme activities and induced the proliferation of beneficial bacteria, such as Mesobacillus, Fictibacillus arsenicus, Ensifer adhaerens, and Lysobacter. This study proposes a novel method for the remediation of soda saline-alkali soils. |
| Key words: algal polysaccharide saline-tolerant bacteria pH soda saline-alkali soil remediation plant |